A new specie has recently been discovered in Argentina. It's called Jakapil kaniukura.
There is already some drama around it, but nothing formalized; one leading expert who also peer-reviewed the research later tweeted her doubt as to the new species being a Thyerophoran (Ankylosaurs + Stegosaurs, which incidentally is her field of expertise) and that it instead is an armored Ceratopsian, which is even more buck wild, but the notion is getting some traction for some simple reasons: 1 - both Thyreophorans as well as Ceratopsians are as good as non existent in all of Gondwana (save for 2 species of Stegosaurid and 1 Ankylosaurid in Africa) - meaning any remnant of these groups are bound to have evolved unique forms never seen in typical Thyreophorans or Ceratopsians - meaning both are equally incredible, and none is less likely than the other; a strange, bipedal basal Thyreophoran 100 million years after any similar relative died out OR an equally bizarre bipedal, armored Ceratopsian.
2 - the details, obviously. Her main point of contention was lacking Thyreophoran traits (save for the very obvious armor, but armor is not uniquely Thyreophoran!), as well as a lower jaw that screams Ceratopsian. Once pointed out, more and more leading figures agreed, although still - totally informally, all on Twitter. It got to the point of discord, aggressive subtweeting - but the main jist (and point of insult for the original research-team) is that they have been "blinded" by the large pieces of armor, commonly known in Thyreophorans, jumped the gun, and described it as such, without considering the possibility that what they found was *even more* incredible.
She is however open to the idea that the original team was right all along, since the skeleton is very incomplete, but it's quite intriguing - not only might it be South America's second only known Thyreophoran dinosaur, but it might even be its first Ceratopsian - and even the worlds first armored Ceratopsian. It's just very cray cray!
Half related: If you ever wonder how many dinosaurs are still missing, consider this: Imagine the span of time as slices, and imagine TODAY as a slice of time - a slice that is roughly 100 000 years thick, meaning throughout this slice, we don't see any significant evolution - we have a mostly stable fauna, around the world, one that includes the ice age fauna: Imagine... somewhere as small as Denmark: As of today, there are afaik badgers there, foxes, there are weasels, wild cats, squirrels, countless species of rodent, hares, rabbits, there are deers - probably 1-3 species that might wander in and out of the main continent - of the megafauna, there's any that can fit, that move through Europe at the time, including moose, vicent, rhinos and mammoth, even if actual evidence remains uncollected, to hunt them would be wolves, wolverines, bears, lynxes and lions - there are multiple representatives of every bird family, there are so many types of duck, so many songbirds, so many sparrows - but the entire fossil record from Denmark, representing dinosaur species, in a time-span of 220 million years - is ONE species; represented by two... sole... teeth.
The rest is gone! Missing! Now begin multiplying, across the world, across time
The only reason we have a feeling "lots" of dinos are known (around 2000 species are named, of which about half are considered fully valid), is because of some few hotspots around the world, Gobi desert, Yixian in Liaoning province PRC, Morrison and Hell Creek formations in the US, Dinosaur Park formation in Canada, Cambridge Greensand in the UK and several similar hotspots in Argentinean Patagonia - and even these places showcase diversities in the dozens of species, not the hundreds that were potentially present (Except for Yixian, and the so called Jehol-fauna, which consists of entire warehouses of species awaiting description!)
The rest of the world's fossil sites are not like that, and yield a tooth here, a rib there.
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